Add a 'Documentation change' section to the PR body.
This instructs the PR submitter to edit the section
with notes for the team editing the documentation.
If a PR has such notes, a maintainer should then
apply the needs-documentation-change label, so
that the documentation team can easily filter
such PRs by label.
Suggested-by: Miika Turkia <miika.turkia@gmail.com>
Signed-off-by: Lubomir I. Ivanov <neolit123@gmail.com>